1. Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials and Institute for Advanced Materials, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
2. Institute for Advanced Materials, Hubei Normal University, Huangshi 435002, China
3. Laboratory of Solid State Microstructures, Nanjing University, Nanjing 21009, China